He reiterated that he is back at 100% while taping NBC's Super Bowl pre-game show on Sunday, saying:

"This is a great place to get back and debut the healthy Nick. Everybody's out here having a good time, and you know people were worried like, 'Is he going to be able to do the Super Bowl pre-show?' But I am 100 percent feeling good right now."

One thing he doesn't feel good about is giving up steaks in an effort to eat healthier so his body stays at 100%, but at least he's not dieting alone. He explained that both he and his wife, Mariah Carey, are watching what they eat, just watching different things, saying:

"I used to be a fast-food junkie. She gets to have higher protein, which isn't fair because I love my steaks and I can't eat that anymore. Her carbs are lower so we are both on a diet, but it is different."

Even though these two are avoiding different food, they've got the same healthy goal, so we're sure they'll be there to support each other's diet plans.